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题名: Oxidative dehydrogenation of n-butane to butenes on Mo-doped VMgO catalysts
作者: Liu, Xue1, 2;  Duan, Linhai1;  Yang, Weishen2;  Zhu, Xuefeng2
刊名: RSC ADVANCES
发表日期: 2017
DOI: 10.1039/c7ra04936f
卷: 7, 期:54, 页:34131-34137
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: VMgO catalysts with different molybdenum doping amounts were prepared by an impregnation method. The structure, specific surface area, and basic and redox properties of these catalysts were determined by XRD, BET, CO2-TPD, and H-2-TPR. The XRD results revealed that all catalysts contained an orthovanadate phase (Mg-3(VO4)(2)), while no metavanadate and pyrovanadate phases were detected. BET surface area analysis showed that the Mo-doped catalysts possessed lower surface areas than the undoped one. The reducing and basicity properties of the catalysts were characterized by H2-TPR and CO2-TPD measurements, which demonstrated that Mo-doping improved the redox temperature and reduced the number of basic sites. The performances of these catalysts were investigated at different C4H10/O-2 molar ratios, temperatures, and contact times. The Mo-doping not only improved the selectivity of butenes but also inhibited the deep oxidation reactions, although cracking reactions occurred with high levels of Mo doping. When the Mo/V atomic ratio was 3 : 100, n-butane conversion of 34.5% and total butene selectivity of 79.3% were achieved at 630 degrees C. To the best of our knowledge, the oxidative dehydrogenation performance of the synthesized Mo-doped VMgO catalysts described in this work represents a remarkable improvement compared to previous reports.
关键词[WOS]: SUPPORTED VANADIUM-OXIDE ;  MG-O CATALYST ;  SELECTIVE OXIDATION ;  V/MGO CATALYSTS ;  PERFORMANCE ;  ALUMINA ;  OLEFINS ;  MOLYBDENUM ;  1-BUTENE ;  SIZE
语种: 英语
WOS记录号: WOS:000405279100055
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152038
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Liaoning Shihua Univ, Coll Chem Chem Engn & Environm Engn, Fushun 113001, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Xue,Duan, Linhai,Yang, Weishen,et al. Oxidative dehydrogenation of n-butane to butenes on Mo-doped VMgO catalysts[J]. RSC ADVANCES,2017,7(54):34131-34137.
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